Range hood

Abstract

The utility model relates to a range hood, which comprises a casing, a smoke inlet chamber, a smoke outlet and a smoke outlet, the panel is rotationally arranged at the front part of the shell; the air conditioner further comprises an air inlet assembly connected between the back face of the panel and the machine shell, the air inlet assembly comprises an air inlet plate, an air guide plate and two side plate assemblies, the two side plate assemblies are arranged on the left side and the right side of the panel and extend towards the interior of the machine shell, and an air inlet is formed in the air inlet plate. The side edge of the bottom of the air inlet plate is rotationally connected to the machine shell around a first axis extending left and right, the side edge of the top of the air inlet plate is rotationally connected with the first side edge of the air guide plate around a second axis extending left and right, and the second side edge of the air guide plate is rotationally connected to the panel around a third axis extending left and right. The air inlet plate, the air guide plate, the left side plate assembly, the right side plate assembly and the panel jointly define an air inlet cavity communicated with the smoke inlet cavity. The range hood has the advantages that the negative pressure area can move downwards, and the lampblack suction effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a range hood. Background Art

[0002] Range hoods are kitchen appliances that purify the kitchen environment. Range hoods generally include top-suction range hoods and close-suction range hoods. Top-suction range hoods are more beautiful, but their smoke inlet is higher and the smoke extraction effect is limited; compared with top-suction range hoods, close-suction range hoods have lower smoke inlets. However, affected by the appearance structure and internal air duct structure of close-suction range hoods, current close-suction range hoods cannot get closer to the smoke, which greatly limits their smoke extraction effect.

[0003] In order to meet the needs of a lightweight design of the range hood, the range hood will be designed to be thin, that is, the front and rear depth of the casing will be made thin. For example, the Chinese utility model patent application with application number CN202020066610.2 (authorization announcement number: CN211822584U) discloses a range hood, comprising a shell and a fan system arranged in the shell, the lower portion of the shell having a vertically extending smoke inlet chamber, the front side wall of the lower portion of the shell having a smoke inlet port connected to the smoke inlet chamber, and a smoke baffle extending forward horizontally or obliquely is arranged along the upper edge of the smoke inlet port.

[0004] However, the above-mentioned range hoods still have certain shortcomings. The opening direction of the air inlet of this type of range hood is generally horizontally facing forward, which makes the air inlet direction of the range hood and the rising direction of oil smoke have a certain angle, which is not conducive to the inhalation of oil smoke. When stir-frying, the oil smoke will escape from the sides and the front.

[0005] Therefore, existing range hoods need further improvement. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a range hood which can move the negative pressure area downward and improve the oil fume absorbing effect in view of the current status of the prior art.

[0007] The technical solution adopted by the utility model to solve the above technical problems is: a range hood, comprising:

[0008] a casing having a smoke inlet chamber with an open front;

[0009] A panel is rotatably disposed at the front of the housing and is capable of opening and closing the front opening of the smoke inlet chamber;

[0010] It also includes an air inlet assembly connected between the back side of the panel and the casing, the air inlet assembly includes an air inlet plate, an air guide plate, and two side panel assemblies arranged on the left and right sides of the panel and extending toward the casing, the air inlet plate is provided with an air inlet, the bottom side edge of the air inlet plate is rotatably connected to the casing around a first axis extending left and right, the top side edge of the air inlet plate is rotatably connected to the first side edge of the air guide plate around a second axis extending left and right, the second side edge of the air guide plate is rotatably connected to the panel around a third axis extending left and right, and when the panel is in an open state, the air inlet plate, the air guide plate, the left and right side panel assemblies and the panel jointly define an air inlet chamber connected to the smoke inlet chamber.

[0011] In order to realize the rotational connection between the air guide plate and the panel, the left and right sides of the back side of the panel are provided with connecting brackets arranged side by side and extending in the up and down directions. The left and right sides of the second side of the air guide plate are respectively rotationally connected to the two connecting brackets through a third pin shaft extending to the left and right.

[0012] In order to reduce the escape of oil smoke at the front side of the panel, a gap is provided between the second side edge of the air guide plate and the back side of the panel, and the gap constitutes an auxiliary air inlet connected to the air inlet chamber.

[0013] In order to increase the negative pressure area in the front-to-back direction and improve the oil fume absorption effect, the position where the air guide plate is rotatably connected to the back side of the panel is adjacent to the bottom edge of the panel.

[0014] As an improvement, when the panel is in the open state, the air inlet plate is tilted backward from top to bottom, and the air guide plate is tilted forward from top to bottom.

[0015] Considering that if the angle formed between the air inlet plate and the air guide plate is too large, such as a straight angle or greater than 180°, the smoke collection effect will be poor, preferably, when the panel is in the open state, the angle formed between the air inlet plate and the air guide plate is denoted as α, and the value range of α is: 120°<α<180°.

[0016] In order to facilitate the storage of the side panel assembly in the casing, each of the side panel assemblies includes a first side panel and a second side panel arranged in sequence in the left and right directions, the first side panel is connected to the back of the panel and extends toward the casing, the second side panel is vertically connected to the air inlet plate and can deflect back and forth around the first axis with the air inlet plate.

[0017] As an improvement, when the panel is in the open state, the first side panels and the second side panels of the two side panel assemblies are connected in sequence to jointly shield the left and right sides of the air inlet chamber. It is conceivable that when the panel is in the open state, the first side panels and the second side panels of the two side panel assemblies may also partially overlap.

[0018] In order to ensure the stability of the front and rear deflection of the air inlet plate, the bottom of the second side plate is rotatably connected to the housing around a fourth axis extending left and right, and the fourth axis is colinear with the third axis.

[0019] In order to increase the area of ​​the negative pressure zone in the left-right direction, the front edge of the second side plate is connected to the left side or the right side of the air inlet plate.

[0020] Generally, the panel can be opened manually by the user, but in order to realize the automatic control of the panel and the air inlet assembly, a driving device is also provided in the housing, and the power output end of the driving device is connected to the back of the panel, thereby driving the panel to flip forward and backward. The range hood is generally provided with an oil fume concentration sensor, and the driving device and the oil fume concentration sensor can be electrically connected to the control system of the range hood, so that the control system can control the action of the driving device according to the oil fume concentration signal transmitted by the oil fume concentration sensor, thereby driving the panel to open and close.

[0021] As an improvement, the driving device includes an electric push rod, the main body of which is hinged on the rear side wall of the housing, and the end of the telescopic rod of the electric push rod is rotatably connected to the panel. It is conceivable that the driving device can also use a motion mechanism formed by a driving motor and a hinge assembly to drive the panel to deflect.

[0022] Compared with the prior art, the advantages of the utility model are as follows: when the panel is deflected forward and opened, the top of the air inlet plate can be deflected forward and downward with the panel, and while the air guide plate moves forward with the panel, the top of the air guide plate also deflects backward and downward, thereby forming a negative pressure cavity (air inlet chamber) formed by the panel, the air guide plate, the air inlet plate and the left and right side panels, and the negative pressure area of ​​the negative pressure cavity is further down, the air inlet is smoother, and the oil fume absorbing effect is better. On the other hand, the existence of the above-mentioned negative pressure cavity can also reduce part of the aerodynamic noise, and at the same time, the air inlet is positioned lower than the existing air inlet, relatively farther away from the human ear, the sensory noise is smaller, and the user experience is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a range hood according to an embodiment of the utility model (the panel is in an open state);

[0024] Figure 2 This is a left side view of the range hood according to the embodiment of the utility model (the panel is in the open state);

[0025] Figure 3 Figure 2 The schematic diagram of the structure after the side panel assembly on the left side is omitted;

[0026] Figure 4This is a left view of the range hood of the embodiment of the utility model after the left side wall panel of the casing is omitted (the panel is in a closed state);

[0027] Figure 5 It is a three-dimensional structural schematic diagram of the air inlet assembly and panel assembly structure of the range hood according to an embodiment of the utility model;

[0028] Figure 6 for Figure 5 A schematic diagram of the three-dimensional structure after omitting the first plate of the left side panel assembly. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0031] Figure 1-Figure 6 A preferred embodiment of the range hood of the utility model is shown. The range hood includes a casing 10 and a centrifugal fan 12 disposed in the casing 10. The casing 10 defines a smoke inlet chamber 100 which is open at the front. A panel 11 is also disposed at the front of the casing 10. The top of the panel 11 can be rotatably connected to the casing 10 via a hinge mechanism. The panel 11 extends in the left-right direction relative to the rotation axis of the casing 10. The panel 11 can open and close the front opening of the casing 10 as it rotates relative to the casing 10. When the panel 11 is in a state of closing the front opening of the casing 10, the panel 11 extends substantially vertically. The centrifugal fan 12 is disposed in the casing 10. When the centrifugal fan 12 is in operation, negative pressure is generated, and external oil smoke can be sucked into the casing 10.

[0032] The panel 11 is driven by a driving device to deflect forward and backward relative to the main body of the housing 10. Specifically, the driving device of this embodiment adopts an electric push rod 30, the main body of which is mounted on the rear side wall of the housing 10 through a hinge seat, and the end of the telescopic rod of the electric push rod 30 is rotatably connected to the back of the panel 11. When the electric push rod 30 is extended, the panel 11 deflects forward to open, and when the electric push rod 30 is retracted, the panel 11 deflects backward to close.

[0033] An air inlet assembly 2 is further provided between the back of the panel 11 and the front opening of the housing 10. When the panel 11 is closed, the air inlet assembly 2 is offset backward with the panel 11 and is correspondingly stored in the smoke inlet chamber 100 of the housing 10. When the panel 11 is opened, the air inlet assembly 2 is offset forward with the panel 11 and is correspondingly exposed to the outside of the smoke inlet chamber 100 of the housing 10.

[0034] See also Figure 3-Figure 5 The air inlet assembly 20 includes an air inlet plate 21, an air guide plate 22, and two left and right side plate assemblies. An air inlet 210 is provided on the air inlet plate 21. The bottom side of the air inlet plate 21 can be rotatably connected to the bottom of the front opening of the housing 10 through a first pin shaft 41 extending left and right (the axis of the first pin shaft 41 is the first axis), and the top side of the air inlet plate 21 is rotatably connected to the first side of the air guide plate through a row of second pin shafts 42 extending left and right (the axis of the second pin shaft 42 is the second axis). The left and right sides of the back of the panel 11 are provided with connecting brackets 111 arranged side by side and extending in the up-down direction. The left and right sides of the second side of the air guide plate 22 are rotatably connected to the bottom of the two connecting brackets 111 through a third pin shaft 43 extending left and right (the axis of the third pin shaft 43 is the third axis). When the panel 11 is deflected forward and opened, the top of the air inlet plate 21 deflects forward and downward with the panel 11, and at the same time, the top of the air guide plate 22 also deflects backward and downward. When the panel 11 is opened to the extreme position, the air inlet plate 21 tilts backward from top to bottom, and the air guide plate 22 tilts forward from top to bottom. Thus, the panel 11, the air guide plate 22, the air inlet plate 21 and the left and right side panel components form a negative pressure chamber (air inlet chamber 200). The negative pressure area of ​​the negative pressure chamber is further down, the air intake is smoother, and the oil fume absorption effect is better. On the other hand, the existence of the above-mentioned negative pressure chamber can also reduce part of the aerodynamic noise. At the same time, the air inlet 210 is located lower than the existing air inlet 210, relatively farther away from the human ear, and the sensory noise is smaller, which also improves the user experience.

[0035] See also Figure 3 , considering that when the panel 11 is in the open state, if the angle formed between the air inlet plate 21 and the air guide plate 22 is too large, such as a flat angle or greater than 180°, the smoke collection effect will be poor. Therefore, in this embodiment, the angle formed between the air inlet plate 21 and the air guide plate 22 is recorded as α, and the value range of α is: 120°<α<180°. In order to increase the negative pressure area in the front and rear directions and improve the oil smoke absorption effect, the position where the air guide plate 22 is rotatably connected to the back of the panel 11 is adjacent to the bottom edge of the panel 11. More specifically, there is a gap between the second side of the air guide plate 22 and the back of the panel 11, and the gap constitutes an auxiliary air suction port 201 connected to the air inlet chamber 200. In this way, the oil smoke that cannot be sucked and discharged through the air suction port of the air inlet plate 21 in time during the cooking process can be sucked and discharged through the auxiliary air suction port 201 when it flows forward to the front side of the panel 11, thereby reducing the escape of oil smoke from the front side of the panel 11.

[0036] Each side panel assembly includes a first side panel 23 and a second side panel 24 which are sequentially arranged in the left-right direction, wherein the first side panel 23 is a triangular panel, one side of which is connected to the back of the panel 11, and the first side panel 23 extends as a whole toward the inside of the casing 10. The second side panel 24 is vertically connected to the air inlet plate 21, and can deflect forward and backward around the first axis with the air inlet plate 21. In order to ensure the stability of the front-back deflection of the air inlet plate 21, the bottom of the second side panel 24 is rotatably connected to the casing 10 around a fourth axis extending left and right, and the fourth axis is colinear with the third axis. Specifically, the second side panel 24 and the air inlet plate 21 can share the same rotating pin. In order to increase the area of ​​the negative pressure zone in the left-right direction, the front edge of the second side panel 24 is connected to the left side or right side of the air inlet plate 21. A connection block 211 is also provided at the left and right edges of the air inlet plate 21. A positioning pin 2110 extending to the left or right is provided on the connection block 211. A positioning hole 240 is provided on the second side plate 24 of the side plate assembly at a position corresponding to the positioning pin 2110 of the air inlet plate 21. The positioning pin 2110 is inserted into the positioning hole 240. In this way, when the air inlet plate 21 deflects forward and backward, the second side plate 24 can be driven to move together. When the panel 11 is in the open state, the side edges of the first side plates 23 of the two side plate assemblies are also connected in sequence with the corresponding side edges of the second side plates 24, thereby jointly shielding the left and right sides of the air inlet chamber 200.

[0037] When the panel 11 is in the closed state, the panel 11 is arranged vertically, so that the overall front-to-back dimensions of the range hood are smaller when it is turned off, reducing the sense of space oppression for the user. At the same time, the air inlet plate 21 and the air guide plate 22 of the air inlet assembly 20 overlap each other and are folded in the front opening of the housing 10. Only two side panel assemblies are stored in the left and right sides of the smoke inlet chamber 100 of the housing 10, which will not occupy too much space in the inner cavity of the housing 10, avoiding interference with the installation of major components such as the centrifugal fan 12. The air inlet plate 21 and the air guide plate 22 are folded together, basically arranged vertically, which facilitates the oil to drip downward, and then collect into the oil cup 12 through the bottom wall of the housing 10 from front to back and downward.

[0038] An oil fume concentration sensor is generally provided on the casing 10 of the range hood. The above-mentioned driving device and the oil fume concentration sensor can be electrically connected to the control system of the range hood. Thus, the control system can control the action of the driving device according to the oil fume concentration signal transmitted by the oil fume concentration sensor, thereby driving the panel 11 to open and close.

Claims

1. A range hood, comprising: A housing (10) having a smoke inlet chamber (100) with an open front; A panel (11) is rotatably disposed on the front of the housing (10) and is capable of opening and closing the front opening of the smoke inlet chamber (100); The invention is characterized in that it also includes an air inlet assembly (20) connected between the back side of the panel (11) and the housing (10), the air inlet assembly (20) including an air inlet plate (21), an air guide plate (22) and two side plate assemblies arranged on the left and right sides of the panel (11) and extending toward the housing (10), the air inlet plate (21) is provided with an air inlet (210), and the bottom side edge of the air inlet plate (21) is rotatably connected to the housing (10) around a first axis extending left and right. The top side edge of the air inlet plate (21) is connected to the first side edge of the air guide plate (22) by rotation around a second axis extending left and right, and the second side edge of the air guide plate (22) is connected to the panel (11) by rotation around a third axis extending left and right. When the panel (11) is in an open state, the air inlet plate (21), the air guide plate (22), the left and right side panel assemblies and the panel (11) jointly define an air inlet chamber (200) connected to the smoke inlet chamber (100).

2. The range hood according to claim 1, characterized in that: Connecting brackets (111) are arranged side by side and extend in the up-down direction on the left and right sides of the back side of the panel (11), and the left and right sides of the second side edge of the air guide plate (22) are rotatably connected to the two connecting brackets (111) via third pin shafts (43) extending left and right.

3. The range hood according to claim 2, characterized in that: There is a gap between the second side edge of the air guide plate (22) and the back side of the panel (11), and the gap forms an auxiliary air suction port (201) connected to the air inlet chamber (200).

4. The range hood according to claim 1, characterized in that: The position where the air guide plate (22) is rotatably connected to the back side of the panel (11) is adjacent to the bottom edge of the panel (11).

5. The range hood according to claim 1, characterized in that: When the panel (11) is in an open state, the air inlet plate (21) tilts backward from top to bottom, and the air guide plate (22) tilts forward from top to bottom.

6. The range hood according to claim 5, characterized in that: When the panel (11) is in an open state, the angle formed between the air inlet plate (21) and the air guide plate (22) is denoted as α, and the value range of α is: 120°<α<180°.

7. The range hood according to any one of claims 1 to 6, characterized in that: Each of the side panel assemblies comprises a first side panel (23) and a second side panel (24) which are arranged in sequence in the left-right direction, wherein the first side panel (23) is connected to the back side of the panel (11) and extends toward the inside of the casing (10), and the second side panel (24) is vertically connected to the air inlet plate (21) and can deflect forward and backward around the first axis along with the air inlet plate (21).

8. The range hood according to claim 7, characterized in that: When the panel (11) is in an open state, the first side panels (23) and the second side panels (24) of the two side panel assemblies are connected in sequence to jointly cover the left and right sides of the air inlet chamber (200).

9. The range hood according to claim 7, characterized in that: The bottom of the second side plate (24) is rotatably connected to the housing (10) around a fourth axis extending leftward and rightward, and the fourth axis is colinear with the third axis.

10. The range hood according to claim 9, characterized in that: The front edge of the second side plate (24) is connected to the left side or the right side of the air inlet plate (21).

11. The range hood according to any one of claims 1 to 6, characterized in that: A driving device is also provided in the casing (10), and a power output end of the driving device is connected to the back side of the panel (11), thereby driving the panel (11) to flip forward and backward.

12. The range hood according to claim 11, characterized in that: The driving device comprises an electric push rod (30), the main body of which is hinged on the rear side wall of the casing (10), and the end of the telescopic rod of the electric push rod (30) is rotatably connected to the panel (11).

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